So Karma means action. If something a deed looks not very good but the intention is good than the result is good, so intention also plays important role here. Mindfulness also often emphasized by all spiritual teachers. I read somewhere, it says when we wrong someone, the harmful consequences is unavoidable, even in cases where we are unaware of having wronged that person. Another definition is, it is call Karma when you have the intention and you perform the deeds either by speech or body action.

People with mindfulness or awareness will tend to do something bad with awareness too, there are moment when we do something even though we are aware they are not wholesome, in some cases we do it because we have to do it. While other people maybe just careless, without any intention to hurt anyone. Why we practice mindfulness and why people with no intention also have to suffer the consequences?

We know after the Buddha's death, Buddhism splits into 18 sects in total both Mahayana and Theravada. All sects do not have the same definition or understanding of Karma. We can find 'Karma' almost in all Indian spiritual traditions, but they are not the same. So I'm wondering if anyone here, senior brother and sisters can tell me what really Buddha said or taught about this? There is a claim from other spiritual tradition that Buddha's Teaching has been misunderstood by his followers. Thanks guys, I hope all the reply may shed some light of what Karma is exactly.